Research Interests

​My research focuses on addressing bio-optical modelling, optical properties of clear and coastal waters and development of satellite based algorithms.  I am also interested in linking ocean optics and ocean color remote sensing together, to study the interaction of light in the ocean and atmosphere.

My current interests are to review and study the observational and modelling methods for quantifying and monitoring the dynamics and distribution of bio-optical properties and their relation to biogeochemical variables and processes in the Red Sea using in situ, simulated, and ocean color satellite data.

Selected Publications

  • An optical model for the remote sensing of coloured dissolved organic matter in coastal / ocean waters
    S.P. Tiwari, P. Shanmugam
    Estuarine, Coastal and Shelf Science, 93: 396402 , (2011)
  • An optical model for deriving the spectral particulate backscattering coefficients in oceanic waters
    S.P. Tiwari, P. Shanmugam
    Ocean Science, 9:9871001, (2013)
  • Evaluation of inversion models for the satellite retrieval of absorption coefficient of phytoplankton in oceanic / ...
    S.P. Tiwari, P. Shanmugam
    IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, (2013)
  • A robust algorithm to determine diffuse attenuation coefficient of downwelling Irradiance from satellite data in co...
    S.P. Tiwari, P. Shanmugam
    IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing..., (2013)

Education Profile

  • ​Ph.D., Ocean Color Remote Sensing, Indian Institute of Technology Madras, Chennai, India, 2013
  • M. Tech., Remote sensing and GIS, SRM University, Chennai, India, 2009
  • M.Sc. Physics with an Electronics specialization, Gorakhpur University, India, 2007
  • B.Sc. Physics, Mathematics with a minor in Chemistry, Gorakhpur University, India, 2005

Professional Profile

  • 2014-Present: Postdoctoral Fellow, KAUST, Thuwal, Saudi Arabia

Scientific and Professional Memberships

  • ​Fellow-member of the Optical Society of India (OSI), Kolkata, India
  • Student member of the Optical Society of America (OSA)
  • Student member of the Society of Petroleum Engineers (SPE)


  • ​Best mini project award for PORSEC pre-conference tutorial, 2012 at the Central Institute of Fisheries Technology (CIFT) in Kochi, India
  • Student Travel grant to Ocean Optics 2012 provided from the U.S. National Aeronautics and Space Administration (NASA) through a grant administered by The Oceanography Society
  • Financial assistance from IIT Madras for attending international conference at Glasgow, Scotland, UK ,2012
  • Half-time teaching/research assistantship (HTRA) for Ph.D, 2009-2013

KAUST Affiliations

  • ​Red Sea Research Center (RSRC)
  • Division of Biological and Environmental Sciences and Engineering (BESE)